{"id":475567,"date":"2026-10-01T04:28:58","date_gmt":"2026-10-01T11:28:58","guid":{"rendered":"https:\/\/climatescience.press\/?p=475567"},"modified":"2026-10-01T04:29:40","modified_gmt":"2026-10-01T11:29:40","slug":"near-m-solar-flare-erupts-from-ar4535-as-scientists-watch-dual-cmes-for-possible-geomagnetic-effects-by-oct-2","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=475567","title":{"rendered":"Near-M Solar Flare Erupts from AR4535 as Scientists Watch Dual CMEs for Possible Geomagnetic Effects by Oct. 2"},"content":{"rendered":"\n
\"A
AI generated by Grok<\/figcaption><\/figure>\n\n\n\n

On September 30, 2026, sunspot region AR4535 (also tracked as SIDC Sunspot Group 962) produced a strong C8.6 solar flare that peaked at 02:46 UTC. The region had developed increased magnetic complexity (beta- gamma configuration), which made the near- M- class event notable after a period of relatively quiet solar activity.<\/p>\n\n\n\n

\"Image
Sun news for October 1, 2026. The yellow arrow points to a large coronal hole near the center of the Earth-facing solar disk. Look closely, and you might see a heart shape! A coronal hole is a region in the sun\u2019s atmosphere, or corona, where the magnetic field opens out into space and lets fast solar wind escape. It appears dark because the escaping plasma leaves it cooler and less dense. Now facing Earth, this hole should send its fast wind our way by October 3, possibly bringing G1 (minor) geomagnetic storms and auroras. The GOES-19 SUVI instrument captured this view in its 195 angstrom wavelength channel at 7:32 UTC on October 1. Image via NOAA<\/a>.<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

The flare was associated with a coronal mass ejection (CME). SOHO\/LASCO C2 imagery first detected the CME around 03:12 UTC; it had an angular width of roughly 70 degrees and a projected speed of about 450 km\/s, along with Type II and Type IV radio emissions. Modeling indicates this CME is mostly westward-directed and is expected to miss Earth or deliver only a weak glancing blow (possibly around October 4 at the earliest).<\/p>\n\n\n\n

Separately, a filament eruption on September 28 produced a partial-halo CME that is forecast to deliver a glancing blow to Earth around October 2. NOAA SWPC issued a G1 (minor) geomagnetic storm watch for that date, with possible elevated Kp values (highest forecast three-hour Kp around 4.67 \/ G1 levels in some windows). High- latitude aurora is the most likely visible effect if conditions align; mid-latitude chances remain limited.<\/p>\n\n\n\n

\"High-resolution
Sun news for September 29, 2026. This full-disk view shows the sun on the afternoon of September 28, as a long filament<\/a> to the right of the disk began to erupt. The following views show the solar material released in the eruption billowing out into space. Image via NOAA<\/a> and NASA\/ESA<\/a>.<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Overall solar activity has remained low (mostly C- and B- class flares), with AR4535 and a newer region (AR4544) among the numbered groups on the disk. Forecasters expect continued low activity with a chance of additional C- class flares and a slight chance of M-class events in the coming days. Geomagnetic conditions were quiet through September 30, October 1 under ambient solar wind, with the main potential disturbance tied to the September 28 CME arrival.<\/p>\n\n\n\n

The WooGlobe reference (WGA970410) and AI\/stock-footage disclosure match typical space-weather video explainers summarizing these events. For real- time updates, check sources such as NOAA SWPC, SIDC, EarthSky\u2019s daily sun news, or SolarHam.<\/p>\n\n\n\n

\"Image
Sun news October 1, 2026. Here\u2019s today\u2019s sun \u2013 with the most active regions labeled \u2013 as of 5 UTC<\/a> this morning, as seen from Learmonth Solar Observatory in Australia. Original image, without labels, via NSO\/GONG<\/a>. Data acquired by GONG instruments operated by NISP\/ NSO\/ AURA\/ NSF with contribution from NOAA, and labeling by EarthSky. Armando Caussade<\/a> posted today\u2019s sun. Why are east and west on the sun reversed<\/a>?<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

On September 30, 2026, sunspot region AR4535 (also tracked as SIDC Sunspot Group 962) produced a strong C8.6 solar flare that peaked at 02:46 UTC. The region had developed increased magnetic complexity (beta- gamma configuration), which made the near- M- class event notable after a period of relatively quiet solar activity.<\/p>\n","protected":false},"author":121246920,"featured_media":475568,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","advanced_seo_description":"On September 30, 2026, sunspot AR4535 produced a C8.6 solar flare, signaling notable solar activity with CME impacts expected by October 4.","jetpack_seo_html_title":"Exploring Recent Solar Activity: Strong Solar Flare and CME","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[691845880,691845882,691845884,691845883,691845881],"class_list":["post-475567","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-ar4535","tag-coronal-mass-ejection-cme-2","tag-g1-minor-geomagnetic-storm","tag-partial-halo-cme","tag-strong-c8-6-solar-flare","fallback-thumbnail"],"jetpack_publicize_connections":[],"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-1ZIr","jetpack-related-posts":[{"id":422345,"url":"https:\/\/climatescience.press\/?p=422345","url_meta":{"origin":475567,"position":0},"title":"X-CLASS SOLAR FLARE \u2013 CME headed toward Earth","author":"uwe.roland.gross","date":"01\/21\/2026","format":false,"excerpt":"A full-halo CME is heading for Earth following a long-duration X1.9-class solar flare on Jan. 18th. 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Measurements by spacecraft and ground-based observatories agree that the sun\u2019s north and south magnetic poles are rapidly weakening. This could lead to a complete reversal of the sun\u2019s global magnetic field before the end of the year. 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